Improvement in clamps



UNITED STATES PATENT EECE.

WILLIAM H. BRITTON, OF MILFORD, AND OLNEY S. THAYEB, OF BELLING- HAM,MASSACH USETTS; SAID THAYER ASSIGNOR TO SAID BRITTON.

iMPRovEMENT IN cLAMPs.

Specification forming part of Letters Patent No. l5 [,680, dated June 9,1874; application filed May 15,1814.

To all whom it may concern: Y

Beit known that we, VILLIAM H. BRIT- TON, of Milford, county ofVorcester and State of Massachusetts, and OLNEY S. THAYER, ofBellingham, in the county of Norfolk, State of Massachusetts, haveinvented a certain new and useful Improvement in Clamps, of which thefollowing is a description sufficiently full,

clear, and exact to enable any person skilled in the art or science towhich our invention appertains to make and use the same, reference beinghad to the accompanying drawing, forming a part of this specification,in which- Figure l is an isometrical perspective view of our improvedclamp; Fig. 2, a view of the sliding` bracket Fig. 3, a view of thecoupler or ferrule; and Fig. 4, aview of the bolt.

Like letters indicate corresponding parts in the different gures of thedrawing.

Our invention relates to that class of clamps which are used bymanufacturers of doors, sashes, and like articles in setting the jointswhich have been glued, or prior to pinning or fastening the frametogether; and consists in a novel construction and arrangement 'of theparts, as hereinafter fully set forth and claimed, by which a cheaperand more effective im ple ment for this purpose is produced than is nowl in common use.

In Fig. 1, A is the body or beam of the clamp; B D, the brackets; G, theslide; F, the lever, and L the ferrule or coupler. The brackets B D areprovided with runlets U and projections b b, Fig. 2, which projectionsslide in the grooves J J, Fig. 1, and operate to keep the clamps uponthe face-plate T. The lever F is provided with the cam-shaped end E andserrated edge Gr, and is hung in the bracket D upon the journals R. Theslide C has a tail piece or slotted guide, I, which works on the stud i;and there is a link, H, attached to the bracket D, and through which thelever G passes. The ferrule L is provided with side apertures M I), andalso with outwardly-projecting anges Q Q, which enter the grooves J .Jwhen the thimble is in use. The bracket B has a stud, K, projectingafrnmits runletface U, which stud drops into the arcrtugres S S inthe facepl.ed?, as the bracket is moved along the plat ,the bracket being looselyfitted to the plate for this purpose, the bracket l) having a similarstud, and being held upon the plate in a similar manner. The object ofthe ferrule L is to enable the clamp to be lengthened to any desiredextent by coupling on another beam similar to A, by means of the pins N,Figs. 1 and 4, which fit the apertures M l?, Fig. 3, and extend into theapertures S, when in use, thus holdingv the beams together.

From the foregoing the nature and opera tion of our invention will bereadily obvious to all conversant with such matters.

The bracket D being arranged secured on the beam A, as shown in Fig. l,the bracket B is moved along the face-plate a suflicient distance toadmit the article to be clamped or acted upon between the face of theslide C and the face of the bracket B, and the stud K allowed to dropinto 011e of the apertures S. The lever G is then depressed, bringingthe slide C forcibly against the article to be clamped, the lever beingheld down by the link H in a manner 'which will be plainly apparentwithout a more rexplicit description.

By removing the bracket B, and arranging the bracket D centrally on thebeam A, the clamp may be used for a lifting-jack.

The clamp will also be found useful for many purposes other than thosespecified.

It will be obvious that any number of apertures may be made in the plateT; also, that any number of the beams may be coupled together bythimbles or couplers L, the bracket B being placed in a proper positionupon one of the beams before they are coupled;

Having thus described our invention, what we claim is- 'lhe extensibleclamp described, consisting of the brackets B, having the stud K, thebracket D, provided with the slide G and serrated cam-lever F, and thebeam A, having the grooves J J and apertures S S, combined. to operatesubstantially as and for the purpose specified.

WILLIAM H. BRITTON.

OLNEY S. THAYER.

Witnesses:

JAMES R. DAVIS, GEO. V. COOKE.

